6399850 has 12 divisors (see below), whose sum is σ = 11903814. Its totient is φ = 2559920.

The previous prime is 6399847. The next prime is 6399859. The reversal of 6399850 is 589936.

It can be written as a sum of positive squares in 3 ways, for example, as 5433561 + 966289 = 2331^2 + 983^2 .

It is not an unprimeable number, because it can be changed into a prime (6399859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63949 + ... + 64048.

Almost surely, 2^6399850 is an apocalyptic number.

6399850 is a deficient number, since it is larger than the sum of its proper divisors (5503964).

6399850 is a wasteful number, since it uses less digits than its factorization.

6399850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128009 (or 128004 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 6399850 is about 2529.7924816079. The cubic root of 6399850 is about 185.6621028367.

The spelling of 6399850 in words is "six million, three hundred ninety-nine thousand, eight hundred fifty".